Background: The experiment investigated soil Exchangeable Cations (EC) and audited the potential of Phoenix dactylifera and Mangifera indica in CO2 sequestration into soil biomass in other acts as remediating-factor for the sustainability of agriculture. Methodology: The study utilized a stratified sampling research design where Infrared Gas Analyzer (IRGA) was utilized to sample stratified locations within the experimental landmass for CO2 captured in the soil biomass within a five (5) month period. Sorensen’s Species Similarity Index was applied in the study to x-ray and validate the performance of the two tree species for CO2 sequestration potential similarity performance. Results: Results indicated that there exists a potential for the two tree species to sequester atmospheric CO2 at a value of 1.25± 0.13 and 0.47±0.19 for Phoenix dactylifera and Mangifera indica respectively at a five (5) monthly interval. Conclusions: The distribution of exchangeable cation of Ca2+, Mg2+, K+, and Na+ indicated that there exist an increase of the exchangeable cations in the soil solution at the end of the five (5) months with a Coefficient of Variation (CV=101%). An increase was observed in the Cation Exchange Capacity (CEC) of the soil from 7.3cmolkg-1 at the start of the experiment to 7.47 cmolkg-1 at the end of the experiment, indicating increased fertility status of the soils.